and now that you have a new president just installed in mexico, the relations with the united states are especially important to treat the united states' citizens who are peaceful in their intent, innocent in their observation of the mexican laws, where no harm has been done. send that u.s. marine back to america and back to his family in miami. >> senator nelson spoke for nearly six minutes vowing to keep pressing for hammar's release. so, how did he end up in prison to begin with? frankly, the deeper we dig into the story, it gets stranger and stranger. like many other veterans of iraq and afghanistan, johnny hammar has suffered with posttraumatic stress disorder. a lifelong surfer, he finds peace on the water riding waves. after completing a ptsd treatment program last summer, he set off to go on a surfing trip to costa rica. and that's when his life took a terrifying turn. here's gary tuchman. >> reporter: johnny hammar is an american war veteran. he was a marine, serving in infantry in afghanistan and iraq. he decided to drive with a fellow marine from florida in a winnebago, al